Related Clues:

• Botch something up
• Drop a brick, so to speak
• Demagnetize, say
• Demagnetize, e.g.
• Sail off-course, e.g.
• Use the pink end of a pencil
• Invert one's pencil
• Go amiss
• Burn rubber?
• Clean off the chalkboard
• "To __ is human ..."
• Undo, as writing
• Make a wrong move
• Indulge in character assassination?
• Get off the mark?